"Mike Rapoport" wrote in message
ink.net...
Of course this is basically true for any two aircraft, the larger one will
get more passenger miles per gallon. A 777 gets a lot more than a 737 for
instance. The same is true for car vs bus.

Not always the case. From the SAS website, the efficiencies of their various
aircraft:

Family: DH-Q400 (turboprop)
Q400, 58-72 seats, 0.039 liters per seat / km

Family: MD-80 series
MD87, 110-125 seats, 0.048 liters per seat / km (JT8D)
MD81/82, 141-145 seats, 0.043 liters per seat / km (JT8D)
MD90, 147 seats, 0.039 liters per seat / km (V2500)

Family: 737 (all CFM-56)
737-600, 123 seats, 0.044 liters/seat km
737-700, 131 seats, 0.042liters/seat km
737-800, 179 seats, 0.034 liters/seat km

Family: A320
A321-200, 184 seats, 0.031 liters / seat km (V2500)

Family: A330/A340
A330-300, 261 seats, 0.035 liter / seat km (Trent 700)
A340-300, 261 seats, 0.039 liters / seat km (CFM-56)

The bigger planes or those with more efficient engines in each family
do better but it's not necessarily the case that the bigger planes are
more efficient. However you can't compare these exactly as the
short haul are probably more densely packed with seats than long
haul.

Paul